package oj;

import java.math.BigDecimal;
import java.util.Scanner;

public class Day27S {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            BigDecimal a = sc.nextBigDecimal();
            BigDecimal b = sc.nextBigDecimal();
            BigDecimal c = sc.nextBigDecimal();
            BigDecimal d = new BigDecimal(String.valueOf(a)).add(b);
            BigDecimal e = new BigDecimal(String.valueOf(a)).add(c);
            BigDecimal f = new BigDecimal(String.valueOf(b)).add(c);
            if (d.compareTo(c) > 0 &&  e.compareTo(b)>0 && f.compareTo(a)>0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    }
}
